tert-butyl ((4a'R,11b'R)-10'-amino-11b'-methyl-4',4'-dioxido-4a',5',6',11b'-tetrahydrospiro[cyclobutane-1,3'-pyrido[3',2':6,7]oxepino[4,5-b][1,4]thiazin]-2'-yl)carbamate 、
5-氰基-2-吡啶羧酸 、 4-Methylmorpholinium chloride hydrate 在
4-(4,)dimethoxy[1.3.5]triazin-2-yl 、
碳酸氢钠 、
二氯甲烷 、
Sodium sulfate-III 、 silica gel 作用下,
以
tetrahydrofuran methanol 为溶剂,
反应 1.5h,
以to afford a white solid as tert-butyl ((4a′R,11b′R)-10′-(5-cyanopicolinamido)-11b′-methyl-4′,4′-dioxido-4a′,5′,6′,11b′-tetrahydrospiro[cyclobutane-1,3′-pyrido[3′,2′:6,7]oxepino[4,5-b][1,4]thiazin]-2′-yl)carbamate as a white solid的产率得到tert-butyl ((4a'R,11b'R)-10'-(5-cyanopicolinamido)-11b'-methyl-4',4'-dioxido-4a',5',6',11b'-tetrahydrospiro[cyclobutane-1,3'-pyrido[3',2':6,7]oxepino[4,5-b][1,4]thiazin]-2'-yl)carbamate